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IPTables NAT Masquerade – How we do it?
Ever wondered how private networks can share a single public IP without breaking a sweat? Enter iptables NAT masquerade, a powerful tool that makes this possible. Essentially, it functions as a router, cleverly hiding the access of private networks while sharing a...
Postfix error mail transport unavailable – How we figured it out
There are lots of undelivered outgoing emails in my server and I see an error message as Postfix error mail transport unavailable! . What I need to do? One of the typical postfix errors which creates a problem for many of our customers. Mail transport unavailable...
Fail2ban ignoreip – Easy way to whitelist trusted IPs
Fail2ban ignoreip is a default feature to whitelist trusted IPs. Usually, fail2ban bans IPs that are suspicious while monitoring logs. But if the user wants to whitelist a trusted IP, we edit ignoreip in the conf file. At Bobcares, we use fail2ban to whitelist IPs, as...
Fail2ban blacklist IP – Easy way to do it!!
Have you ever wondered how fail2ban blacklist IP? Fail2ban protects our server mainly from brute-force attacks. It bans suspicious IP addresses in the server firewall. At Bobcares, we often receive requests to blacklist IP addresses as part of our Server Management...
Moodle SMTP error could not authenticate- Quick Resolution!!
Are you frustrated with "Moodle SMTP error could not authenticate"? Though moodle comes with many standard features, it is never free of errors. An SMTP authentication error is a tricky moodle error. This occurs mainly due to errors in SMTP fields in moodle...
Postfix queue file size limit exceeded – Quick fix!
Is your server reporting Postfix queue file size limit exceeded error? This can be simply resolved by changing the message size limit in the config file. Mails are so crucial today and so are the mail errors. Hence, at Bobcares we provide an immediate fix for Postfix...
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Rdesktop failed to open display – Quick Fix
Do you need to work on Windows Server when you are much of a Linux guy ?? The rdesktop utility is useful to configure services in a windows server from a Linux system. However, it often fails with error "Rdesktop failed to open display". We troubleshoot rdesktop...
Rsync error code 11 – How we fix it?
Did your daily backup ended up with Rsync error code 11? The error code description says it's an error with the file I/O. Basically, rsync error 11 occurs when the disk space is full or if the system cannot detect the external drive. At Bobcares, we often get requests...
Best way to fix – InnoDB memory heap is disabled
InnoDB works as a better option when dealing with large databases. However, often misconfiguration in the InnoDB settings results in errors. Older MySQL versions report error "InnoDB memory heap is disabled" when the InnoDB uses System memory. At Bobcares, we receive...
SMTP error 452 – Top 4 tried and tested fixes
Are you getting SMTP error 452 when sending mails? The 452 too many recipients error mainly happens due to message overload. When we try to send too many emails at once, the server storage limit exceeds and results in this error. At Bobcares, we often receive requests...
How to run IIS multiple websites on port 80
Web hosts need to accommodate multiple websites on a single server for a cost-effective approach. But, can we run IIS multiple websites on port 80 of the server? Fortunately, with the help of the host header in IIS web server, we can host multiple sites and use the...
VPN error 800 VPN tunnels failed – Top 5 causes and fixes
VPN is a quick way to ensure a secure connection to the server. However, it often shows errors like VPN error 800: VPN tunnels failed. Usually, VPN error 800 occurs due to incorrect server details, network or connectivity errors, firewall restrictions, etc. So, at...
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